Tue, 31 Mar 2015 23:42:57 +0200 wenzelm more visibility flags on background naming;
Tue, 31 Mar 2015 22:31:05 +0200 wenzelm support for explicit scope of private entries;
Tue, 31 Mar 2015 21:12:22 +0200 wenzelm subtle change of long-standing name space policy: unknown entries are treated as hidden, consequently "private" is understood in the strict sense;
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